デバイスが時々「ビリビリ」する理由（ハンナ・フライ）［動画］
スマートフォンやノートパソコンなどのデバイスに触れたとき、時折感じる「ビリビリ」とした感覚の原因を、数学者ハンナ・フライが解説するショート動画。この現象は静電気やアース（接地）の問題によるもので、デバイスの内部構造や充電器の設計が関わっている可能性がある。日常的に遭遇するちょっとした違和感の科学的な背景をわかりやすく紹介している。
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